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Finding the Fourth Proportional to 2,860.86, 3,947.58 and 1,665.51

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Solution

The fourth proportional to 2,860.86, 3,947.58 and 1,665.51 is: 2,298.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,860.86 : 3,947.58 = 1,665.51 : x
  2. Step 2: Convert to fraction form
    2,860.86/3,947.58 = 1,665.51/x
  3. Step 3: Cross multiply
    2,860.86x = 3,947.58 × 1,665.51
  4. Step 4: Simplify right side
    2,860.86x = 6,574,733.97
  5. Step 5: Solve for x
    x = 6,574,733.97/2,860.86
  6. Step 6: Final answer
    x = 2,298.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.